Auxiliary air-inlet device for internal-combustion engines.



A. B. CONRAD.

AUXILIARY MR INLET DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED APR. 10. 914. LJIAL'Y, Patented Dec. 14, 1915.

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A. B. CONRAD.

AUXILIARY AIR INLEI DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED APR. 10. 1914 l,1@%,576. Patented Dec. 14, 1915.

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AUXIIiIAB'if AIR-INLET DEVICE FOR INTERNAL-COMBUSTION ENGINES.

' Specification of Letters Patent.

Patented Dec. ML, 1915.

Application filed April 10,1914. Serial No. 830,991.

a n This nvention relates to an auxiliary air inlet device for internal combustion engines particularly to that class used in conjunction with the carburetors on internal combustion engines, to lessen the quantity-of fuel consur'ned and in other ways to increase the efficiency of the engine.

It is a well known fact that it is practically impossible to set a carbureter in such a manner that its adjustment will be correct for all speeds of the engine with which it is associated. Thus, when set for a relatively slow speed of the engine it is out of adjustment for considerably higher speeds thereof.

The object of this invention is to provide' a device which operates simultaneously with the throttle of the carbureter and'; with the resultant change in speed of the engine, and which increases the proportion of air n the fuel mixture, supplied to the cylinders, upon an increase in the speed of said engine.

Another object is to provide such a device comprising a simple construction and a daptedto be operated by the same means, that operates the throttle, that 1s, elther foot or hand lever. 1 p 1 A further object is to provide a device of this character which can be readily attached either to a central portion of the manifold, or to the connection between the carburetor and the manifold. i

Further objects and advantages are hereinafter brought out inthe following specification when read inconiunction with the accompanying drawings, in wh1ch:' Figure l ferredembodiment of the invention; Fig. 2

is a front elevation of the same; F 3- is a vertical sectional view of the line 3-3 ''of Fig. 2, showing the device coupled tothe connection between a carburetor and a manifold. Fig. 4 is a. detailed view on the line Jr- 4 of Fig. 1 ;.;;and Fig. 5 is a sectional view on the line 5-5 of Fig. 3. I i

"Referring to the drawings, the invention in its preferred embodiment,-ucompr ises a globular shaped body 1, having a threaded opening 2 at the top, and an EXJBIISIOI). 3 at is a side elevation ofthe pre-' one side, provided with central opening 4: and threaded upon its outer side 5, while the "bottom of said. body is provided with an enlarged threaded opening 6, adapted to receive a removable frame 7, comprising substantially circular side walls 8 surrounded by a flange 9 adapted to bind against the lowermost edge of the body 1 when said frame is screwed into the opening 6. Said frame'7 is further providedwith a, central opening 15 in its lower end Walls through which slidably passes a shaft or pin 16, while the side walls 8 are provided with opp0- sitely disposed openings 17 for the free admission of air, and one or more additional openings 18, intermediate the opening 17, and adapted to receive the enlarged portion 19of an angularly bent lever 20. Said-lever 20 is bifurcated at its inner end and adapted. to partially surround the pin 16 and bear against the collar 22, secured upon said pin,

While the outermost end .of said lever is enlarged and provided with an eye 23 toreceive a chain, link, or other suitable connection with a; desired actuating means. Said lever is'pivotally mounted upon a pin 24, passing centrally through the enlarged portion 19 and journaled at 25 in the side walls 8 of the frame 7. A modified form of lever may be mounted as shown by the dot-anddash lines in Figs. 1 and 2.

Substantially intermediate of the length of the pin 16 are secured a nut 30 and valve disk 31, the latter being circular and beveled upon its peripheral edge portion to cooperate with the beveled seat 32 of the uppermost edge of the frame 7. Also surrounding the pin 16 is an adjustable sleeve 33, provided with a head 34 by which the same is turned, said sleeve being threaded upon its outer to compress a helical spring 36 against the upper surface of the valve disk 31. A second spring 37 is compressedbetween the collar 22 and thenut 30, the spring 36, however, being much stronger and acting in such manner as to positively seat said valve 31.

In'Fig. 3 is illustrated any desired form of carbureter 40 with the usual adjustable air inlet 41, fuel inlet 42 and combustible mixture outlet 43, said'outlet being connected by the hollow section of pipe 44 to the Y 45, the branches of said V leading to the respective cylinders of an internal conibustion engine. The section 44 1s shaped in any convenient manner to receive the extenface 35, and adapted to engage the inter-.:. nally threaded opening 2 of the body 1, and

sion 3 from the body portion 1 of the device and embodying the present invention.

In the operation of the device above described, the throttle 46 on the carbureter and the leverQO of the economizer are preferably connected together and to the same speed operating lever of the machine. As

the speed of the engine increases, and it is necessary to admit a greater amount of air into the manifold in proportion to the amount of fuel gas admitted, the lever 20 is operated in the direction of the arrow, thus pressing upwardly upon the spring 37, which relieves or equalizes a portion of the downward pressure of the spring 36 upon the valve disk 31, whereupon the vacuum in the cylinders, and'theflefore in the mani fold, acts to raise said valve and admit a definite additional amount of air to maintain the desired richness of the fuel mixture. As is evident from the drawings the position of the sleeve 33, and therefore the tension of the spring 36 upon the valve disk, is variable and is adjusted by revolving said sleeve in the proper direction.

For the purpose of increasing the ease.

with which an engine provided with this device can be started, any desired amount of fluid, either liquid or gas may be admitted, by way of the nipple 48, through the lower-most'portion of the body 1, and thence through the capillary bore 49 into the body 1, said bore terminating in the valve seat 32 so that it is opened simultane ously with the opening of the air passage in the said body 1. It is to be noted that this auxiliary opening through the nipple 48 and bore 49 may also be used for the ad mission of various forms of fluids for counteracting or cleaning the carbon deposit from the engine cylinders, for lubricating said cylinders, for supplying pure oxygen 'to increase the efficiency of the'engine,.and

for various other uses. In this connection it should be noted that in the event of the :fuelsupply to the carbureter being clogged or otherwise made inoperable, it is possible '"tocontinue the running of the engine by supplying the fuel, generally gasolene,

through the nipple 48 and through the body 1 into the engine cylinder by way of the usual manifold and other connecting channels.

While I have described but one form in 'wh'ichthis' invention may be embodied it is obvi-ous that numerous changes may be made thereinwithout departing from the spirit of the invention or the scope of the-appended claimshat I claim is 1. In combination with the manifold of an internal combustion engine, a device comprising a hollow body having a threaded valve, an opening from said body in the manifold, a collar carried by said rod, another spring tensioning device carried by said rod and disposed within said frame, a second adjustable resilient means embracing said rod and interposed between one face of the collar and the opposite face of the last mentioned spring tensioning device, a lever co-acting with the opposite face of the collar for operating said valve, a throttle valve, and arod connecting the lever with said throttle valve, whereby the tension of the second resilient means is altered in accordance with the positiomof the throttle valve.

- 2. In combination with the manifold of an internal combustion engine, a device comprising a hollow body having a threaded opening in the upper and lower portions thereof, a frame threadedly connected with the lower threaded opening of said body and formed with a valve seat, a rod passing vertically through said body and frame, a valve disk, a sprin tensioning device threadedly connected in the upper" opening of the body, resilient means disposed within of the-collargand .the opposite face of the last mentioned spring tensioning device, a lever pivotally mounted in the side walls of the frame at a point below said last named spring tensioning device and co-acting with the opposite face of the collar for operating said seat valve, a throttle valve, and a rod connecting the lever with such throttle valve, whereby the tension of the second resilient'means is alteredin accordance with the position of the throttle valve.

In testimony whereof I afiix my signature in presence of two witnesses. v ARCHIE B. CONRAD.

Witnesses:

-. S. Wamvm SLACK, 'NonMAN 3. SMITH. 

